Circutor CVM-NRG96 User manual

Power Analyzer
CVM-NRG96
User manual
Extended version

CVM-NRG96
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Checks on receipt.
This manual assists in the installation and use of the CVM NRG 96 power analyzer so
that the best possible use can be gained from it. On receipt of the equipment check
the following:
The equipment corresponds to the specifications in your order.
Check that the equipment has not been damaged during delivery.
Check that it has the correct instruction manual.
For safety reasons it is essential that anyone installing or
handling the CVM NRG 96 follow the usual safety procedures
as well as the specific warnings in this instruction manual.
Installing and maintenance for this analyzer must be carried
out by a qualified person.
TABLE OF CONTENTS

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General features ……………… page 4
Installation and start-up ……………… page 6
Power supply voltage ……………… page 6
Maximum voltage in the measurement circuit ……………… page 7
Maximum admissible current ……………… page 7
Features of the transistor ……………… page 7
Operating conditions ……………… page 7
Safety ……………… page 7
Connection diagrams ……………… page 9
Operation ……………… page 13
Setting menus ……………… page 14
Programming SETUP Measurement ……………… page 15
Status of Setup Measurement ……………… page 15
Simple or compound voltages ……………… page 16
Transformation ratios ……………… page 16
Programming the power demand meter ……………… page 18
Programming the main page and preferred energy …..…… page 19
Backlight (Back-lighting of the display) ……………… page 20
Deletion of Energy meters ……………… page 21
Programming THD or d ……………… page 21
Transistor digital output ……………… page 22
Programming SETUP Communications ……………… page 26
Setting communication parameters ……………… page 27
Protection of SETUP measurement ……………… page 30
MODBUS protocol RTU ……………… page 31
MODBUS memory map ……………… page 32
RS485 connection ……………… page 35
FAQ’S (Frequently Asked questions) ……………… page 36

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General features
The CVM-NRG 96 panel analyzer is a programmable measuring instrument; it offers
a series of options for using it, which may be selected from configuration menus on
the instrument itself. Before starting the analyzer carefully read sections: power
supply, connection and setting and select the most suitable form of operation in order
to obtain the required data.
The CVM-NRG 96 measures, calculates and displays the main
electrical parameters in three phase, balanced or unbalanced
industrial systems.
Measurements are taken in true effective value using the three
alternating voltage inputs and three current inputs to measure 5
A secondaries from external measurement toroids.
With its processor, the measurement station allows simultaneous analysis of:
MAGNITUDE UNIT L1 L2 L3 III
Simple Voltage V•••
Compound voltage V•••
Current A••• ••
Frequency Hz •
Active power kW ••• •
Reactive Power L kvarL ••• •
Reactive Power C kvarC ••• •
Apparent Power kVA •
Power Factor PF •••
Cos Cos •
Maximum Demand Pd •
Neutral Current IN•
Voltage THD % THD – V •••
Current THD % THD – A •••
kWh (consumption and generation)W·h •
kvarh.L (consumption and generation)W·h •
kvarh.C (consumption and generation)W·h •
kVAh (consumption and generation)W·h •
Harmonic decomposition (V and A) *%•••15th
9( • ) Available through display and communications.
9( •• ) Only available through communications.
9( * ) Harmonic decomposition in model HAR.

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The CVM-NRG 96 allows the display of all electrical parameters shown above, using
the back-lit LCD display, showing 4 instant electrical parameters, maximum or
minimum on each page jump.
Other features:
Small sized instrument (96x96x50).
Measurement in true effective value.
Instant, maximum, minimum values for each parameter.
Energy measurer function.
- 1 GW·h in consumed energy.
- 100 MW·h in generated energy.
Backlit LCD display.
RS485 communications (Modbus RTU®) included.
Available models:
CVM-NRG96 CODE
CVM-NRG96 M51800
CVM-NRG96-ITF M51900
CVM-NRG96-ITF-RS485-C M51911
CVM-NRG96-ITF-RS485-C-HAR M51B11
CVM-NRG96-ITF-P-RS485-C M51A11

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Installation and start-up
This manual contains information and warnings that must be followed by the user to
ensure the safe operation of the equipment and to maintain it in a safe condition. The
analyzer must not be switched on until it is finally attached to the electrical board.
IF THE EQUIPMENT IS HANDLED IN A WAY NOT SPECIFIED BY THE
MANUFACTURER, THE EQUIPMENT'S PROTECTION MAY BE COMPROMISED
When it is likely that the equipment has lost its protection (with visible damage), it
must be disconnected from the auxiliary supply. In this event, contact a qualified
technical service representative.
Installing the equipment
Check the following points before switching the equipment on:
a) Power supply voltage.
b) Maximum voltage in the measurement circuit.
c) Maximum admissible current.
d) Features of the transistor (digital output).
e) Operating conditions.
f) Safety.
A. Power supply voltage
Standard version:
- Power supply : 230 V AC.
- Frequency : 50-60 Hz
- Power supply tolerance : -15% / +10%
- Connection board : Terminals 1-2 (Power Supply)
- Consumption of the equipment : 5 V·A
Version Plus:
- Power supply : 85…265 V AC. // 95…300 V DC.
- Frequency : 50-60 Hz
- Connection board : Terminals 1-2 (Power Supply)
- Consumption of the equipment : 5 V·A

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B. Maximum voltage in the measurement circuit:
- Voltage : 300 V AC. phase-neutral
520 V AC. phase-phase
- Frequency : 45…65 Hz
C. Maximum admissible current:
- Current : External transformers In /5A.
D. Transistor features(output):
- NPN Type : Opto-isolated Transistor /Open Collector
- Maximum operating voltage: 24 V.DC.
- Maximum operating current: 50 mA
- Maximum frequency : 5 pulses / second
- Pulse length : 100 ms
E. Operating conditions:
- Operating temperature : -10 ºC / +50ºC
- Relative humidity : 5 to 95 % HR (without condensation)
- Altitude : up to 2,000 metres
F. Safety:
- Designed for category III installations 300 V AC. (EN 61010).
- Protection against electric shock by class II double isolation.
Installation
Installation for the equipment is by panel(panel drill 92+0.8 x 92+0.8 m.m., according to
DIN 43 700). All connections must remain inside the electrical board.
Bear in mind that when the equipment is connected, the terminals may be
dangerous if touched. Opening covers or removing parts may access parts
which are dangerous if touched. The equipment must not be used until it is
fully installed.
The equipment must be connected to a power supply circuit protected with gl (IEC
269) or type M fuses between 0.5 and 2 A. It must have an overload/short circuit
switch or equivalent device in order to disconnect the equipment from the power
supply. The power supply circuit and the voltage measurement circuit is connected
with a cable with a minimum cross section of 1 mm2.
The secondary line for the current transformer shall have a minimum cross section of
2.5 mm2.

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Terminal list
No. Terminal description
1Power supply voltage input
2Power supply voltage input
3Transistor output RL1
4Transistor output RL2
5RS-485 ( + )
6RS-485 ( - )
7RS-485 ( GND )
8Measurement VL1
9Measurement VL2
10 Measurement VL3
11 Neutral measurement
12 Current input AL1 – S2
13 Current input AL1 – S1
14 Current input AL2 – S2
15 Current input AL2 – S1
16 Current input AL3 – S2
17 Current input AL3 – S1
13
8
12
25
10 14 16
74
9
13
6
11 15 17
Note: Internally terminals 13, 15 and 17 are joined to terminal 6, Neutral (in no
isolated model).
The current inputs... / 5 A are isolated in model ITF.

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Connection diagrams
A. Three phase system measurement with 4 wire connection (Low Voltage) and
three external current transformers.
Power supply AC. // Version Plus DC.
Power supply “Plus”
Terminal Description
1
2
+ V DC.
- V DC.

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B. Three phase system measurement with 3 wire connection (Low Voltage) and
three external current transformers.
Power supply AC. // Version Plus DC.

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C. Three phase system measurement with 3 wire connection using 2 transformers
and three external current transformers.
Power supply AC. // Version Plus DC.

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D. Three phase system measurement with 3 wire connection using 2 voltage
transformers and two external current transformers.
Power supply AC. // Version Plus DC.

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o
re
s
e
t
max
mi n
Operation
Generic functions of the front keypad:
Key Reset:
Starting the equipment.
Deletion of Maximum and Minimum values.
This is equivalent to starting the equipment in the absence of
voltage.
Key Display:
Displaying all variables by repeated presses.
Function key in set-up menu: pressing the Display key moves
forward through different screens, both on the configuration menu
and the communications menu.
In runtime mode, a long press (keeping the key pressed for 2
seconds), displays the energy meters:
9Active Energy Consumed
9Reactive Inductive Energy Consumed
9Reactive Capacitive Energy Consumed
9Apparent energy Consumed
9Active energy Generated
9Inductive Reactive Energy Generated
9Reactive Capacitive Energy Generated
9Apparent Energy Generated
Key Max and Min:
Display of maximums or minimums for each variable displayed; this
function is only valid while the key is being pressed. Once it is
stopped being pressed the instant values appears again after five
seconds.
Function keys in set-up menu: the MIN key selects the code or
parameter to be changed and the MAX key assigns the
corresponding code and/or variable.

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Configuration Menu
TheCVM-NRG96 analyzer has two configuration menus:
1. MEASUREMENT SETUP:
from this menu, the user can set the measurement parameters and the
analyzer's different display options.
- Measurement Setup Status (locked or unlocked)
- Simple or compound voltages
- Transformation ratios
- Power Demand Meter Setting
- Main page and preferred energy setting
- Backlight (Backlit display)
- Deletion of Energy meters
-
-
2. COMMUNICATIONS SETUP:
Configures the communication parameters: speed, parity, stop bits, etc; it
also accesses the locking menu using a password in the measurement SET
UP.
- Communication parameters setting
- Protection of measurement SETUP.

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Setting MEASUREMENT SETUP
The parameters for the CVM-NRG 96 and all its functions are displayed and changed
from this menu (according to type); it may start the eight energy meters and return
maximum demand to zero (Pd), maximums and minimums recorded.
The analyzer does not store the changes to the settings until the whole setting
program has been completed. If it is RESET before the end of the setting process, the
configuration entered is not stored in the memory.
)To access MEASUREMENT SETUP the MAX and MIN keys have to
pressed at the same time until setting mode is entered.
On entering setting mode the message "SETUP unlo", or as a default "SETUP loc"is
displayed for a few seconds indicating that we are in setting and informing of their
status (locked or unlocked).
SETUP unlo
On entering setting mode it is possible to see and change the setting.
SETUP loc
On entering setting mode it is possible to see the setting but not possible to
change it.
Once in MEASUREMENT SETUP using the keypad, it is possible to select the
different options and enter the variables:
The keypad functions to carry out the setting are as follows:
The key enters the data and moves on to the following menu.
The MAX key allows the selection of the different options in the menu or
increases a digit in the event that a variable has been entered.
The MIN key is used to move the cursor among the digits.

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1. Simples or Compound Voltages
Simple Voltages U1 U2 U3
Compound Voltages U12 U23 U31
To select one of the two display options, just press the MAX key and the two
options will alternate.
Once the required option is selected, press the key to enter the data and
access the next setting step moving on to the next setting step.
2. Transformation Ratios
Transformer voltage primary
The display shows “set Uolt Prl”followed by three digits; these allow the
setting of the transformer voltage primary.
Set
Uolt
PrI
000001
To write or change the value of the transformer primary value repeatedly
press the MAX key increasing the value of the digit which is flashing at the
time.
When the required value is on the screen, move on to the following digit by
pressing MIN, to allow the remaining values to be changed.
When the last digit has been changed, press MIN to move back to the first
digit, allowing the previously set values to be changed again.
To enter the data and access the next setting step, press .
U1
U2
U3
U1 2
U2 3
U3 1

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Transformer Voltage Secondary
The display shows “set Uolt Sec” followed by three digits; these allow the
setting of the transformer voltage secondary.
Set
Uo l t
Sec
001
To write or change the value of the transformer secondary value repeatedly
press the MAX key increasing the value of the digit which is flashing at the
time.
When the required value is on the screen, move on to the following digit by
pressing MIN, to allow the remaining values to be changed.
When the last digit has been changed, press MIN to move back to the first
digit, allowing the previously set values to be changed again.
To enter the data and access the following setting step, press .
Transformer current primary
The display shows ”set Curr PrI” followed by five digits; these allow the
setting of the transformer current primary.
Set
Cu r r
Pr I
00001
To write or change the value of the transformer primary value repeatedly
press the MAX key increasing the value of the digit which is flashing at the
time.
When the required value is on the screen, move on to the following digit by
pressing MIN, to allow the remaining values to be changed.
When the last digit has been changed, press MIN to move back to the first
digit, allowing the previously set values to be changed again.
To enter the data press .

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3. Setting the Power Demand Meter
Magnitude to Integrate
The display shows “set pd Code” followed by two digits which identify the
code or variable to be integrated as Maximum Demand.
None 00
Three phase active power kW III 16
Three phase apparent power kV·A III 34
Three phase current AIII 36
Current per phase A1 - A2 - A3 A-Ph
The MAX key allows the selection of the Maximum Demand variable to be
integrated.
Once selected to access the next setting step, press .
Integration Period
The display shows “set pd Per” followed by two digits which will identify the
period of integration for the selected magnitude.
Set
PD
PEr
15
To write or change the value of the integration period repeatedly press the
MAX key increasing the value of the digit which is flashing at the time.
When the required value is on the screen, move on to the following digit by
pressing MIN, to allow the remaining values to be changed.
When the last digit has been changed, press MIN to move back to the first
digit, allowing the previously set values to be changed again.
The integration period may vary between 1 to 60 minutes.
To enter the data and access the following setting step, press .

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Deletion of maximum Demand
The display shows “Clr pd no”.
To select one of the two display options, just press the MAX key and the two
options will alternate.
Once the required option is selected, press the key to enter the data and
access the following setting step.
4. Setting the main page and preferred energy
Preferred page and fixed or rotating mode
The display shows ”set def pa9e Uars”.
SEt
dEF
PA9 E
UARS
Fixed page: Default value display when switched on or the CVM-NRG 96
started.
The MIN key has to be repeatedly pressed until the required default page
is displayed; to enter the page and access the following step the key
has to be pressed.
Rotating page: Display of all electrical parameters using the automatic
rotation of the 12 screens in intervals of 5 seconds.
The MIN key has to be repeatedly pressed until all of the electrical
magnitudes flash; to enter the rotating function and access the following
step, the key has to be pressed.
Cl r
pd
no
Cl r
Pd
Ye s

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Preferred Magnitude of Energy
The display shows ”set def pa9e Ener” and the Active Energy symbol (kWh)
flashes.
SEt
dEF
PA9 E
Ener
By repeatedly pressing the MAX key the required energy magnitude is
selected. This may be:
Magnitude of Energy Direction Symbol
Active Energy Consumption kW·h
Inductive Reactive Energy Consumption kvarL·h
Capacitive Reactive Energy Consumption kvarC·h
Apparent Energy Consumption kVA·h
Active Energy Generation (-) - kW·h
Inductive Reactive Energy Generation (-) - kvarL·h
Capacitive Reactive Energy Generation (-) - kvarC·h
Apparent Energy Generation (-) - kVA·h
Once the energy has been selected press the key to enter the data and
access the next setting step
5. Backlight (Backlit display).
Backlight timer
The display shows ”set disp off”.
SEt
dI sp
off
00
Indicates the screen protector time (in seconds), disconnecting the
Backlight.